Vertex Standard VXR-7000, Service Manual

Page: 8 / 146

8 VXR-7000 UHF Service Manual
Operating Manual Reprint
C
B
A
A
B
Figure 1
FILTER Unit
Switching
Regulator
Unit
Figure 2
Changing Switching Regulator unit AC Mains Jumper Wiring
Before attempting this jumper wire change, remove the
AC power cord from the AC jack on the rear panel.
 Referring to Figure 1, remove the 14 screws affixing
the top and bottom covers of the repeater, and remove
the covers.
 Remove the eight screws affixing the shield cover for
the FILTER Unit, and remove the cover (see Figure
1).
 Disconnect all wires and connectors from the FILTER
Unit, then remove the six screws affixing the Switch-
ing Regulator Unit, and remove it (the Switching
Regulator Unit is mounted with the FILTER Unit: Fig-
ure 2).

Referring to Figure 3, remove the four screws and re-
move the heatsink from the Switching Regulator Unit.
 Referring to Figure 4, perform the correct jumper wir-
ing on the Switching Regulator Unit for the AC Mains
voltage used in your area (100-127 VAC or 207-253
VAC).
 Replace the heatsink onto the Switching Regulator
Unit, then replace the Switching Regulator Unit onto
the chassis, and connect all wires and connectors to
the FILTER Unit.
 Replace the AC fuse (
FH6001
) on the FILTER Unit
according to the AC Mains voltage range:
100 VAC (100-127 VAC): 5A
200 VAC (207-253 VAC): 3A.
 Replace the shield cover and replace the top and bot-
tom covers. This completes the wiring change.
Important!
: If you change the AC voltage range, you must
also change the AC fuse on the FILTER Unit. Do not re-
place with a slow-blow type fuse.